[특허]Method of makig a superabsorbent polymer foam

Method of makig a superabsorbent polymer foam 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08J-009/20 C08J-009/28
출원번호	US-0037803 (1993-03-26)
발명자 / 주소	Van Phan Dean (West Chester OH) Trokhan Paul D. (Hamilton OH)
출원인 / 주소	The Procter & Gamble Company (Cincinnati OH 02)
인용정보	피인용 횟수 : 52 인용 특허 : 0

초록 ▼

A method of making an improved superabsorbent polymer foam having a morphology to provide improved absorptive properties is disclosed. The foam preferably comprises a superabsorbent polymer formed from a substantially water-soluble, unsaturated monomer having neutralized carboxyl groups and a substantially water-soluble internal crosslinking agent. The monomer and crosslinking agent are expanded in the presence of a substantially water-insoluble blowing agent and a suitable solvent and reacted to form a superabsorbent polymer foam having substantially continuous, intercommunicating channels substantially throughout the foam and a relatively high surface area to mass ratio. Absorbent products, members and articles containing the foam are also disclosed.

대표청구항 ▼

A method of making an open-celled superabsorbent polymer foam, the method comprising the steps of: (I) forming a reaction mixture comprising: (a) a substantially water-soluble unsaturated monomer comprising neutralized carboxyl groups; (b) a substantially water-soluble internal crosslinking agent capable of reacting with said monomer to form a superabsorbent polymer material; and (c) a solvent selected from the group consisting of water, a substantially water-soluble solvent, and mixtures thereof; (II) dispersing a substantially water-insoluble blowing agent in said reaction mixture to form a dispersion of particles of said blowing agent in said reaction mixture, said blowing agent having a vaporization temperature at a pressure of 1 atmosphere in the range of about -20°C. to about 100°C.; (III) stabilizing said dispersion to form a stable dispersion of said blowing agent particles in said reaction mixture; (IV) expanding said blowing agent particles to form an expanded structure, wherein said expansion step comprises: (a) increasing the temperature of said stable dispersion to a temperature which is greater than or equal to the vaporization temperature of said blowing agent, less than or equal to the activation temperature of said reaction mixture, and less than the vaporization temperature of said solvent; and/or (b) decreasing the pressure on said stable dispersion; (V) reacting said monomer and said internal crosslinking agent to form a superabsorbent polymer material; and (VI) controlling said dispersion step (II), said stabilization step (III), said expansion step (IV) and said reaction step (V) to form a superabsorbent polymer foam comprising a plurality of mutually connected struts of said superabsorbent polymer material to form open cells such that the foam has: (a) a surface area to mass ratio of at least about 0.2 m2/g; (b) an average cell size of less than about 100 microns; and (c) a density of less than about 0.5 g/cm3.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Method of makig a superabsorbent polymer foam 원문보기

초록 ▼

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Method of makig a superabsorbent polymer foam 원문보기

초록 ▼

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연구과제 타임라인

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